audioOS 9.9.15.4

audioOS 9.9.15.4 (build 19L440) is an official Apple over-the-air update for the HomePod (Unknown Model), released on 2022-03-14T17:12:33Z. The update package is 1.24 GB. This is a delta (partial) update that requires 13.4.6 to already be installed on the device - it cannot be applied from scratch. This update is no longer signed by Apple, meaning it can no longer be downloaded and applied on-device through Settings.

The OTA payload file is 91f18eedfd1eb380c3ad2d7315112de7fd95f915.zip.